/*
This file is part of Keepass2Android, Copyright 2013 Philipp Crocoll. This file is based on Keepassdroid, Copyright Brian Pellin.

  Keepass2Android is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation, either version 2 of the License, or
  (at your option) any later version.

  Keepass2Android is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with Keepass2Android.  If not, see <http://www.gnu.org/licenses/>.
  */

using Android.App;
using Android.Content;
using KeePassLib;

namespace keepass2android
{
  public class AddEntry : OperationWithFinishHandler
  {
    protected Database Db
    {
      get { return _app.CurrentDb; }
    }

    private readonly IKp2aApp _app;
    private readonly PwEntry _entry;
    private readonly PwGroup _parentGroup;
    private readonly Database _db;

    public static AddEntry GetInstance(IKp2aApp app, PwEntry entry, PwGroup parentGroup, OnOperationFinishedHandler operationFinishedHandler, Database db)
    {

      return new AddEntry(db, app, entry, parentGroup, operationFinishedHandler);
    }

    public AddEntry(Database db, IKp2aApp app, PwEntry entry, PwGroup parentGroup, OnOperationFinishedHandler operationFinishedHandler) : base(app, operationFinishedHandler)
    {
      _db = db;
      _parentGroup = parentGroup;
      _app = app;
      _entry = entry;

      _operationFinishedHandler = new AfterAdd(app.CurrentDb, entry, app, operationFinishedHandler);
    }


    public override void Run()
    {
      StatusLogger.UpdateMessage(UiStringKey.AddingEntry);

      //make sure we're not adding the entry if it was added before.
      //(this might occur in very rare cases where the user dismissis the save dialog 
      //by rotating the screen while saving and then presses save again)
      if (_parentGroup.FindEntry(_entry.Uuid, false) == null)
      {
        _parentGroup.AddEntry(_entry, true);
      }

      // Add entry to global
      _db.EntriesById[_entry.Uuid] = _entry;
      _db.Elements.Add(_entry);

      // Commit to disk
      SaveDb save = new SaveDb(_app, _app.CurrentDb, operationFinishedHandler);
      save.SetStatusLogger(StatusLogger);
      save.Run();
    }

    private class AfterAdd : OnOperationFinishedHandler
    {
      private readonly Database _db;
      private readonly PwEntry _entry;
      private readonly IKp2aApp _app;

      public AfterAdd(Database db, PwEntry entry, IKp2aApp app, OnOperationFinishedHandler operationFinishedHandler) : base(app, operationFinishedHandler)
      {
        _db = db;
        _entry = entry;
        _app = app;
      }



      public override void Run()
      {
        if (Success)
        {

          PwGroup parent = _entry.ParentGroup;

          // Mark parent group dirty
          _app.DirtyGroups.Add(parent);
          // even mark the parent of the parent dirty to update the views showing the number of child entries
          if (parent?.ParentGroup != null)
          {
            _app.DirtyGroups.Add(parent.ParentGroup);
          }



        }
        else
        {
          StatusLogger.UpdateMessage(UiStringKey.UndoingChanges);
          //TODO test fail
          _entry.ParentGroup.Entries.Remove(_entry);
        }

        base.Run();
      }
    }


  }

}

